:root {
    --cream: #fff7e8;
    --cream-2: #fffdf8;
    --navy: #0f2746;
    --navy-2: #183b63;
    --orange: #ff8a3d;
    --orange-2: #ffb169;
    --purple: #9f86ff;
    --purple-2: #efe9ff;
    --blue-soft: #eaf4ff;
    --ink: #152033;
    --muted: #667085;
    --line: rgba(15,39,70,.12);
    --shadow: 0 22px 70px rgba(15,39,70,.12);
    --radius: 28px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--ink);
    background: var(--cream-2);
    line-height: 1.75;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font: inherit; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.skip-link { position: absolute; left: 14px; top: -44px; background: var(--navy); color: #fff; padding: 8px 14px; border-radius: 999px; z-index: 99; }
.skip-link:focus { top: 12px; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,253,248,.92); backdrop-filter: blur(16px); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 900; color: var(--navy); }
.brand-mark { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 16px; background: linear-gradient(135deg, var(--orange), var(--purple)); color: #fff; box-shadow: 0 12px 30px rgba(255,138,61,.22); }
.brand-text { font-size: 1.18rem; letter-spacing: .04em; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { color: var(--navy); padding: 9px 13px; border-radius: 999px; font-weight: 700; font-size: .95rem; }
.main-nav a:hover, .main-nav a.active { background: var(--navy); color: #fff; }
.menu-btn { display: none; border: 0; background: var(--navy); color: #fff; border-radius: 14px; width: 44px; height: 44px; }
.section { padding: 84px 0; }
.section-soft { background: radial-gradient(circle at top left, rgba(255,138,61,.24), transparent 32%), linear-gradient(135deg, var(--cream), #fff 62%, var(--purple-2)); }
.section-blue { background: linear-gradient(135deg, var(--navy), var(--navy-2)); color: #fff; }
.hero { padding: 92px 0 78px; overflow: hidden; }
.hero-grid, .two-col { display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 54px; }
.reverse { grid-template-columns: .98fr 1.02fr; }
.eyebrow { margin: 0 0 10px; color: var(--orange); font-weight: 900; letter-spacing: .14em; font-size: .82rem; text-transform: uppercase; }
.section-blue .eyebrow { color: var(--orange-2); }
h1, h2, h3 { margin: 0 0 16px; color: var(--navy); line-height: 1.18; }
.section-blue h1, .section-blue h2, .section-blue h3 { color: #fff; }
h1 { font-size: clamp(2.2rem, 5vw, 4.6rem); letter-spacing: -.05em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.65rem); letter-spacing: -.035em; }
h3 { font-size: 1.22rem; }
.lead { font-size: 1.15rem; color: #334155; margin: 0 0 26px; }
.section-blue .lead, .section-blue p { color: rgba(255,255,255,.82); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px; border-radius: 999px; font-weight: 900; border: 1px solid transparent; cursor: pointer; }
.btn.primary { background: var(--orange); color: #fff; box-shadow: 0 16px 36px rgba(255,138,61,.24); }
.btn.ghost { background: rgba(255,255,255,.68); border-color: var(--line); color: var(--navy); }
.section-blue .btn.ghost { color: #fff; border-color: rgba(255,255,255,.22); background: rgba(255,255,255,.08); }
.metric-row { display: flex; flex-wrap: wrap; gap: 14px; }
.metric-row span { display: inline-flex; gap: 8px; align-items: baseline; padding: 10px 14px; border-radius: 18px; background: #fff; border: 1px solid var(--line); color: var(--muted); }
.metric-row strong { color: var(--navy); font-size: 1.28rem; }
.card-raised, .rounded-art { border-radius: var(--radius); box-shadow: var(--shadow); border: 1px solid rgba(255,255,255,.72); }
.hero-art { position: relative; background: #fff; padding: 18px; }
.floating-note { position: absolute; right: 20px; bottom: 22px; background: var(--navy); color: #fff; border-radius: 999px; padding: 10px 14px; font-weight: 800; box-shadow: 0 16px 36px rgba(15,39,70,.2); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 34px; }
.section-head.left { text-align: left; margin-left: 0; }
.section-head p { color: var(--muted); }
.card-grid { display: grid; gap: 24px; }
.card-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card-grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.playlist-card, .info-card, .video-card, .thread-card, .side-panel, .feedback-form, .contact-notes article { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.card-body, .video-card { padding: 22px; }
.playlist-card img, .video-thumb img { width: 100%; object-fit: cover; background: var(--cream); }
.tag { display: inline-flex; align-items: center; padding: 5px 10px; border-radius: 999px; color: var(--navy); background: rgba(255,138,61,.16); font-size: .82rem; font-weight: 900; margin-bottom: 12px; }
.tag.purple { background: var(--purple-2); }
.tag.blue { background: var(--blue-soft); }
.mini-btn { border: 0; background: var(--navy); color: #fff; border-radius: 999px; padding: 9px 13px; font-weight: 800; cursor: pointer; }
.mini-btn.soft { background: var(--cream); color: var(--navy); border: 1px solid var(--line); }
.action-row { display: flex; flex-wrap: wrap; gap: 10px 14px; color: var(--muted); font-size: .92rem; align-items: center; }
.topic-list { display: grid; gap: 12px; margin-top: 24px; }
.topic-list a { border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.08); border-radius: 18px; padding: 14px 16px; color: #fff; font-weight: 800; }
.rating-strip { display: grid; grid-template-columns: 1.25fr repeat(3, 1fr); gap: 20px; align-items: stretch; }
.rating-strip img, .rating-item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.rating-item { display: grid; align-content: center; gap: 5px; text-align: center; }
.rating-item strong { font-size: 3rem; color: var(--orange); line-height: 1; }
.rating-item small, .info-card small { color: var(--muted); }
.pill-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.pill-grid a { display: flex; justify-content: space-between; gap: 12px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px; font-weight: 900; box-shadow: 0 14px 36px rgba(15,39,70,.08); }
.pill-grid span { color: var(--orange); font-size: .92rem; }
.comment-stack { display: grid; gap: 16px; }
blockquote { margin: 0; padding: 18px; border-radius: 22px; background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 30px rgba(15,39,70,.08); color: var(--navy); }
blockquote span { display: block; margin-top: 10px; color: var(--muted); font-size: .9rem; }
.faq-wrap { max-width: 860px; }
details { background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 18px 20px; margin-bottom: 14px; box-shadow: 0 10px 26px rgba(15,39,70,.06); }
.section-blue details { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.18); }
summary { cursor: pointer; font-weight: 900; color: var(--navy); }
.section-blue summary { color: #fff; }
.page-hero { padding: 82px 0; }
.info-card { padding: 26px; }
.info-card strong { color: var(--orange); font-size: 2rem; }
.icon-dot { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 15px; background: var(--navy); color: #fff; font-weight: 900; margin-bottom: 18px; }
.check-list, .steps { padding-left: 1.2rem; }
.check-list li, .steps li { margin: 10px 0; }
.timeline { display: grid; gap: 16px; }
.timeline article { border-left: 4px solid var(--orange); background: #fff; border-radius: 20px; padding: 20px 24px; box-shadow: 0 12px 30px rgba(15,39,70,.07); }
.filter-bar { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 28px; }
.filter-btn { border: 1px solid var(--line); background: #fff; color: var(--navy); border-radius: 999px; padding: 10px 16px; font-weight: 900; cursor: pointer; }
.filter-btn.active { background: var(--navy); color: #fff; }
.board-layout { display: grid; grid-template-columns: 280px 1fr; gap: 24px; align-items: start; }
.side-panel { padding: 22px; position: sticky; top: 96px; }
.side-panel a { display: flex; justify-content: space-between; border-bottom: 1px solid var(--line); padding: 12px 0; font-weight: 800; }
.thread-list { display: grid; gap: 18px; }
.thread-card { display: grid; grid-template-columns: 58px 1fr; gap: 18px; padding: 22px; }
.avatar { width: 58px; height: 58px; display: grid; place-items: center; border-radius: 22px; background: var(--orange); color: #fff; font-weight: 900; }
.avatar.purple { background: var(--purple); }
.avatar.blue { background: var(--navy-2); }
.rating-guide { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.rating-guide article { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); padding: 24px; box-shadow: var(--shadow); }
.rating-guide strong { color: var(--orange); font-size: 2.4rem; }
.rating-guide span { display: block; font-weight: 900; color: var(--navy); }
.score-table { display: grid; gap: 12px; }
.score-table div { display: grid; grid-template-columns: 1.3fr 1fr auto auto; gap: 16px; align-items: center; background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.18); border-radius: 20px; padding: 16px; }
.score-table b { color: var(--orange-2); font-size: 1.5rem; }
.video-thumb { position: relative; margin: -22px -22px 18px; }
.video-thumb span { position: absolute; right: 14px; bottom: 14px; background: var(--navy); color: #fff; border-radius: 999px; padding: 5px 10px; font-weight: 900; }
.contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: start; }
.feedback-form { padding: 26px; display: grid; gap: 16px; }
.feedback-form label { display: grid; gap: 8px; font-weight: 900; }
.feedback-form input, .feedback-form textarea, .feedback-form select { border: 1px solid var(--line); border-radius: 16px; padding: 12px 14px; background: #fffdf8; color: var(--ink); }
.form-note { color: var(--muted); margin: 0; }
.contact-notes { display: grid; gap: 16px; }
.domain-card, .domain-line { display: inline-flex; align-items: center; gap: 8px; padding: 13px 16px; border: 1px solid var(--line); border-radius: 18px; background: #fff; color: var(--navy); font-weight: 800; }
.site-footer { background: #07192d; color: rgba(255,255,255,.76); padding: 58px 0 28px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr .75fr 1fr; gap: 34px; }
.footer-grid strong, .footer-brand { color: #fff; display: block; margin-bottom: 10px; }
.footer-grid a { display: block; margin: 8px 0; color: rgba(255,255,255,.76); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 20px; margin-top: 30px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.hide-card { display: none; }
@media (max-width: 940px) {
    .menu-btn { display: inline-grid; place-items: center; }
    .main-nav { position: absolute; left: 20px; right: 20px; top: 72px; display: none; flex-direction: column; align-items: stretch; background: #fff; border: 1px solid var(--line); border-radius: 22px; padding: 12px; box-shadow: var(--shadow); }
    .main-nav.open { display: flex; }
    .hero-grid, .two-col, .reverse, .contact-grid, .board-layout { grid-template-columns: 1fr; }
    .card-grid.three, .card-grid.four, .pill-grid, .rating-strip, .rating-guide, .footer-grid { grid-template-columns: 1fr; }
    .side-panel { position: static; }
    h1 { font-size: clamp(2rem, 10vw, 3.2rem); }
    .section { padding: 62px 0; }
}
@media (max-width: 560px) {
    .container { width: min(100% - 24px, 1160px); }
    .hero { padding-top: 60px; }
    .floating-note { position: static; margin-top: 12px; display: inline-flex; }
    .score-table div { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; }
}